Disagree on the elevation aspect here, sometimes taking the time to really jump into your shot gets it blocked...

Not everyone is like Tmac in his prime....

Personally, I think you just need to speed up a little bit more at the beginning, as it seems to take an age for you to go from catching the ball to releasing the ball at your highest point...

Take care not to ruin your form....

Over the years, I've discovered that after playing 15 years, my shot has automatically become a lot faster and smoother, compared to even 5 years ago. Just because I've practices shooting for so long...